00713nam0-22002531i-450-990001215920403321000121592FED01000121592(Aleph)000121592FED0100012159220000920d1----km-y0itay50------baengNonlinear approximation theoryby Braess D.Berlin [etc.]Springer-Verlag1Springer series in computational mathematics7Braess,Dietrich56587ITUNINARICAUNIMARCBK990001215920403321C-54-(75184MA1MA1Nonlinear approximation theory342963UNINAING01